When strain waves pass through a ferromagnetic bar,owing to piezomagnetic effect,a nonuniform magnetic current will be stimulated by the strain wave simultaneously. 應變波通過鐵磁性桿件時，由于壓磁效應，會同時在桿件中激發出不均勻的磁流。
A thresholding method based on fuzzy exponential entropy and simulated annealing algorithm is proposed to segment a gridding image with nonuniform illumination efficiently. 摘要為了有效分割照度不均勻的網格圖像，提出了一種基于模糊指數熵和模擬退火算法的閾值分割方法。